None of the 3 u mentioned were nearly as dominatant late in their careers as they were in the mid 20s, and Pete is the only one in the realm of Federer's dominance. He wasnt nearly the same player in altho still good.

In brief, im not saying Federer will be a nobody now, im saying his one man domination of the sport is over.

In brief, I'm saying it's still too early to tell. One bad season where he's still managed to play at a really high level despite struggling doesn't convince me that he can't come back and dominate next year.